Air-heater.



. MATHIS.

AIR HEATER.

APPLIOATION'PILED Nov.1e,19os.

Patented Jan. 12, 1909 UNITED 4srarns PATENT ernten.

AUGUST MATHIS, 0F CHICAGO, ILLIN'IS, ASSIGNOR TO MATH-IS Bit-OTHERS CMPAYY,

A CORPORATION OF'lNDIAiNA.

Alemania;

To all whom it ma concern:

Be it known t at LAUGUST MATHIs, a

citizen of the United States of America, and

a resident of Chica o, in the county of Cook and State. of'I inois, have invented 'certain new and usefulIm rov'ements in Air-Heaters, of which the ollowing is a specification.

through which steam as the heating medium passes, preferably the exhaust steam from the engine employed in the air heating sys-v tem. And the present invention has for its objectto provide a simple and eilicient structural arrangement and combination of part-s f whereby a very efcient and economical heating effect is attained, and which at the same tune increases the eliiciency of the engine, to the exhaust end of whichit is connected, all as-will hereinafter more fully appear.

In the accompanying drawings: Figure 1 .,V is a vertical sectional elevation on line :zz-, Fig. 2. Fig. 2, is ahorizontal sectional viewin line :0L-ai Fig. 1. Fig. 3, is a fragmentary detail sectional elevation illustrating the means of attachment .between the spiral coils and the hea ders withwhich they haye communication.

Similar numerals of reference indicate like parts in the several views.

Referring to the drawings, 1 represents a portion of the trunk or casing through which the air to be heated is passed in manner usual to air heatin systems.

2 is the tubular supp y head of the present heater arranged at one side of the casing 1 and connected to the exhaust end of an engine, or other suitable'source of steam supply. 3 is a counterpart tubular vsteam and water discharge head arranged in parallel and 'separated relation to the supply head 2 aforesaid, and connected to a suitable receiver for the water of condensation which forms continually in the practical operation of the system.

4, are a series of upper tubular manifold heads extending laterally from the steam supply head 2; such manifold heads have a parallel and separated relation to each other and arranged within the casing 1 to approximately cover the cross area' of the same as shown in Fig. 2.

Specification of Letters-Patent.

Application filed November 1B, 1908. Serial No. 462,753.

Patented AJ'zm. 12, 1909.

5, are a corresponding series of lower tubular manifold heads extending laterally from the discharge head 3, and having an arrangement in the casing l similar to the heads 4 above described. Such lower manifold heads 5 are of a much smaller diameter than the upper manifold heads 4, so as to offer less impedance to the passage of the air to be heated, and at the same time admit of the free discharoe of the water of condennow to be described.

`6, are spiral coils of pipe, a series of which. are individual to *an individual upper and. lower manifold head 4 and 5, and are connected thereto preferably by 'the special ,means hereinafter described, and have a separated relation to-each other and to the next adjacent coils ofthe adjoining series, es shown in Fig. 2.

7, are -a series of connecting nipples by which the respective ends of the spiral coils 6 are connected to the n'ianifoldheads 4 5 aforesaid. In their preferred form each nipple will have an externally screwthreaded shank 8 adapted `to screw into the wall of a manifold head, and an internally screwthreaded neck 9 adapted to screw on to the ends of a spiral coil, as shown in Figs. 1 and 3.

Having thus fully described my said insecure by Letters Patent, is

1. In an air heater or the like, the combination of counterpart tubular supply and discharge heads arranged in separated relation', series of manifold heads extending laterally from the supply and discharge heads and arranged in separated relation, a series of spirally coiled pipes arranged between pairs of said manifold heads and communi' eating therewith, and a casing inclosing said manifold heads and coiled pipes, snbstan tially as set forth.

2. In an air heater or the like, the combination of upper and lower tubular supply anddischarge heads arranged in separated relation, series of manifold heads extending laterally from said supply and discharge heads and arranged in separated relation, a vertical series of spirally coiled pipes arranged between pairsof said manifold heads and communicating therewith, and a casing inclosing said lmanifold heads and coiled pipes, substantially as set forth.

sation coming from the air heating coilsl vention what I claim as new and desire to 3. In anairheater or the like, the combination of counterpart tubular supply and l discharge heads arran ed in separated rela- ',tion, sriesjof manifol heads extending lat- [5 erally from .the supply and discharge heads d arra ed in se arated relation, one 4series -of inanifo d heads avi a smaller diameter 1 than the other series o manifold heads, a' seriesof spirally coiled pipes arranged be- '10 tween'pairs ofsaid manifold he 'is and cornf-municating therewith, and a ca .1g inclsing y said manifold heads and coiled pipes, subst antially as set forth.

j 4. In an air heater or the like, the coin- ,15'binatin of upper and lower tubular supply f anddschar e heads arranged in separated relation, series of manifold heads extending laterallyr-- from said supply and discharge headsnnd Aarranged in separated relation, 201`the'lower series of manifold heads having a smaller diameterthan the upper series of -manifo1d heads, a vert-ical series of spirally -coiled, )loi s arranged betweenpairs of.' said `--manifo dpieads and communicating there- 2 5 with, and acasing inclosing said manifold f-Ifhads andvcoile d pipes, substantially. as set -rfo'rtlr'V A 1 5.In'an airlh'eater or the like,'the'com binationpf'oointerpart tubular supply'. and 130 A harge-headslarraned in' separated relamanifol heads extendi laterallyI-fi'omthe supply andA dschargen'ea'ds and arranged in separated relation, a series of spirally coiled pipes arranged between pairs of `said manifold heads, a fseries of 35' tubular nipples connecting the ends of. said coiled pipes to the manifo d heads, each nipple havin an externally screw-threaded shank land an internallyV screvvf-th'readed neck, and a casing inclosing saidimanifold-io heads and coiled pipes, substantially as set forth. v f 6. -In an air heater or the like, the' combination of upper and lowertubular supply and discharge heads arranged-,in separated 45 relation, seriesof manifold heads extending laterallyv from said supply and dischargeheads and arrangedin separated relation, a. l vertical 'series of spirallyxcoiled lpipes ar- -raned .between '.pa'irs of said manifold. 5o vhea s, a series o''L-tubularA nipples connecti the ends ofxsaid coiled 4pipes to' the manifoll' heads, each nipple having an externally screw-threaded shank and'lan internally screwthreaded'neck, and acasing inclosing 5.3 saidrnanifold :heads and coiled pipes, substantially asset forth. f

.signed at Chicago,- niinois, this lethaayof`November, 1908.

- AUGST Marins.4 Witnesses: i

ROBERT BURNS,

HENRY Mon. 

